JPS589471Y2 - Flexible conduit aerial power transmission line - Google Patents

Description

[Detailed explanation of the idea] The present invention relates to a flexible conduit aerial power transmission line.

In order to obtain good flexibility, conduit aerial power transmission lines are sometimes constructed with corrugated tubes for both the inner and outer tubes.

However, as a matter of course, the corrugated tube has unevenness on its surface, so a spacer is required to support the corrugated tube.Fixing rings have been provided inside and outside the disk spacer to span multiple periods of the unevenness.

However, in order to maintain the flash voltage of the disk spacer above a certain value, it is necessary to increase the width of this fixing ring, which poses a problem in that flexibility is impaired.

That is, it is difficult to embed a mechanical reinforcing material in a disk spacer from the manufacturing standpoint, and mechanical strength is generally maintained by widening the base of the spacer.

Moreover, inserting the disk spacer over its entire length is extremely troublesome in manufacturing.

On the other hand, was there an idea to provide a continuous spiral spacer?
It was not practical for large objects or high voltage applications because it was unreliable, apart from the case when the voltage was low in detail.

Furthermore, post-shaped spacers are known as spacers, and their use was considered, but post spacers are easy to mechanically reinforce from the manufacturing standpoint, and there is no need to widen the base. Therefore, there was a menot that could reduce the contact area with the pipe.

However, if the inner pipe is a corrugated pipe, it is difficult to adjust the angle of the post spacer, and if you have to glue each part one by one with adhesive, the work is extremely troublesome, and as a result, it is difficult to install the post spacer. It was even more difficult than the disk spacer.

In view of this situation, the present invention aims to provide a flexible conduit aerial power transmission line that eliminates the above-mentioned drawbacks. It's because I used it.

The configuration of the present invention will be specifically explained with reference to the drawings showing one embodiment.

In the figure, 1 is an internally corrugated tube, and 2 is an externally corrugated tube.

An internal fixing ring 3 divided into a plurality of parts in the circumferential direction is provided on the outside of the internally corrugated tube 1, and three post spacers 4 are provided around the internal fixing ring 3. An external fixing ring 5 is provided which is divided into a plurality of parts in the direction.

With such a configuration, for example, the internal fixing ring 3 and the post spacer 4, which are divided into a plurality of parts in the circumferential direction, are attached to the internal corrugated tube 1 at intervals of approximately 120°. The external fixing ring 5, which is divided into a plurality of parts in the circumferential direction, is integrally attached to the outside of the post spacer 4, and then these are inserted into the external corrugated tube 2, and the disk spacers are inserted one by one into the internal corrugated tube 1. There is no need to insert it for .

The flexible conduit aerial power transmission line of the present invention described above has the following remarkable effects.

(1) Since a post spacer is used, there is no need to widen the width of the base unlike a disc spacer, and the width of the inner and outer fixing rings can be smaller than that of the disc spacer, providing excellent flexibility.

(2) Since the internal fixing ring and the external fixing ring are divided in the circumferential direction using a post spacer, attachment to the internal corrugated tube is easy, and manufacturing is simple.

(3) Since a post spacer is used, it is also possible to circulate the refrigerant inside the external corrugated pipe.

[Brief explanation of drawings]

The figure is an explanatory diagram showing an embodiment of the present invention. 1: Internal corrugated tube, 2: External corrugated tube, 3: Internal fixing ring, 4: Post spacer, 5: External fixing ring.

Claims (1)

[Scope of utility model registration request] In a flexible conduit aerial power transmission line in which two corrugated tubes 1 and 2 are coaxially supported by a spacer and sealed with insulating gas, the outside of the internal corrugated tube 1 is divided into a plurality of sections in the circumferential direction. An internal fixing ring 3 is provided, a post spacer 4 is fixed on the outside of the internal rotating ring 3, and an external fixing ring divided into a plurality of parts in the circumferential direction is provided on the outside of the post spacer 4. 5 is fixed, and the external fixing ring 5 and the external corrugated pipe 2 are in contact with each other.